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authorYu Zhao <yu.zhao@intel.com>2009-04-03 15:18:11 +0800
committerJesse Barnes <jbarnes@virtuousgeek.org>2009-04-06 11:21:40 -0700
commit7eb93b175d4de9438a4b0af3a94a112cb5266944 (patch)
treed92404ff26d269f8b1f4db2b3cd7a3f0f9f830ff /drivers/pci/quirks.c
parent0221c81b1b8eb0cbb6b30a0ced52ead32d2b4e4c (diff)
downloadlinux-7eb93b175d4de9438a4b0af3a94a112cb5266944.tar.bz2
PCI: SR-IOV quirk for Intel 82576 NIC
If BIOS doesn't allocate resources for the SR-IOV BARs, zero the Flash BAR and program the SR-IOV BARs to use the old Flash Memory Space. Please refer to Intel 82576 Gigabit Ethernet Controller Datasheet section 7.9.2.14.2 for details. http://download.intel.com/design/network/datashts/82576_Datasheet.pdf Signed-off-by: Yu Zhao <yu.zhao@intel.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'drivers/pci/quirks.c')
-rw-r--r--drivers/pci/quirks.c48
1 files changed, 48 insertions, 0 deletions
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 9b2f0d96900d..51011a24589d 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -2411,6 +2411,54 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x4375,
#endif /* CONFIG_PCI_MSI */
+#ifdef CONFIG_PCI_IOV
+
+/*
+ * For Intel 82576 SR-IOV NIC, if BIOS doesn't allocate resources for the
+ * SR-IOV BARs, zero the Flash BAR and program the SR-IOV BARs to use the
+ * old Flash Memory Space.
+ */
+static void __devinit quirk_i82576_sriov(struct pci_dev *dev)
+{
+ int pos, flags;
+ u32 bar, start, size;
+
+ if (PAGE_SIZE > 0x10000)
+ return;
+
+ flags = pci_resource_flags(dev, 0);
+ if ((flags & PCI_BASE_ADDRESS_SPACE) !=
+ PCI_BASE_ADDRESS_SPACE_MEMORY ||
+ (flags & PCI_BASE_ADDRESS_MEM_TYPE_MASK) !=
+ PCI_BASE_ADDRESS_MEM_TYPE_32)
+ return;
+
+ pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_SRIOV);
+ if (!pos)
+ return;
+
+ pci_read_config_dword(dev, pos + PCI_SRIOV_BAR, &bar);
+ if (bar & PCI_BASE_ADDRESS_MEM_MASK)
+ return;
+
+ start = pci_resource_start(dev, 1);
+ size = pci_resource_len(dev, 1);
+ if (!start || size != 0x400000 || start & (size - 1))
+ return;
+
+ pci_resource_flags(dev, 1) = 0;
+ pci_write_config_dword(dev, PCI_BASE_ADDRESS_1, 0);
+ pci_write_config_dword(dev, pos + PCI_SRIOV_BAR, start);
+ pci_write_config_dword(dev, pos + PCI_SRIOV_BAR + 12, start + size / 2);
+
+ dev_info(&dev->dev, "use Flash Memory Space for SR-IOV BARs\n");
+}
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x10c9, quirk_i82576_sriov);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x10e6, quirk_i82576_sriov);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x10e7, quirk_i82576_sriov);
+
+#endif /* CONFIG_PCI_IOV */
+
static void pci_do_fixups(struct pci_dev *dev, struct pci_fixup *f,
struct pci_fixup *end)
{